A riding lawn mower is the yard king's throne, whisking the king along the yard at great speeds with a minimum of effort. Although robust machines, riding lawn mowers are put through their paces on the hills and bumps of the common backyard. Riding lawnmowers are a bit more complex than their push brethren, although troubleshooting is not nearly as complex as fixing a problem with a car. Follow the basic troubleshooting instructions to get your mower running smoothly.
Check that you have a full charge in your battery before assuming the transmission is not working.
Make sure the mower engagement lever, if there is one, is disengaged. The mower will not start or move into gear if it is engaged.
Engage the clutch so that the engine will crank. Depress the clutch foot pedal and lift up on the clutch button if one is present. A faulty clutch will not allow the engine to fire, meaning the transmission belts do not move.
Check the transmission belts for cracking or wear. See if there is any debris keeping the belt form moving properly.
Check that there are not any bolts missing from the transmission if there is excessive vibration when mowing.